Matej Kravjar

<p>Plugin adds section to post edit page in WordPress admin, where the post metadata are displayed in convenient table with the option to export the data into JSON format</p>


Post Meta View and Export

This plugin adds possibility to view and export post metadata for superadmins.

Philip Newcomer

<p>This plugin makes all custom fields (post meta) visible in the “Custom Fields” meta box on post edit screens.</p>


Show Hidden Post Meta

As a plugin developer, I create hidden post meta all the time and sometimes I need to see it to debug it. This does what it says it does, and well. Its simple and hasn't been updated for a while, but I'm glad it exists!

PS: If you need someone to take this one over, let me know. I'll keep it tested and updated if you're unable to.

Still works on 5.5

Makes hidden post meta visible on post edit screens

Post Meta View and Export vs Show Hidden Post Meta